I am following v4 and ASHRAE 90.1 - 2016.

I have an Hotel in Climate Zone 3A, therefore I am using System 2 (PTHP) for Baseline.

In the Hotel, there are VRFs and centralized Outdoor Air (OA) ventilation through FAHUs.

How can I consider the OA in the Baseline model? Should I design an centralized air loop to provide OA? or Should I consider PTHP with local OA supply?